IIR filter design(S-Z transform method)

FilterSpec
Filter type
Sampling freq. Hz
Cutoff freq.(Low) Hz *Specify cut off frequency less than half of sampling frequency.
Cutoff freq.(High) Hz *disable this content when you specify LPF or HPF.
Cutoff Gain [dB] dB *Specify absolute number
Dimention

Gain Character


Gain Character (dB)


Phase Character


Group Delay Character


difference equation
Dim1 : aY[n] = -bY[n-1] + cX[n] + dX[n-1]
Dim2 : aY[n] = -bY[n-1] - cY[n-1] + dX[n] + eX[n-1] + fX[n-2]

coefficient

specific lists
No, freq[Hz] , gain(magnification) , gain[dB] , phase[rad], group delay[smpl]